By @ianawilson, @jambonrose
adds fix for SingleObjectTemplateResponseMixin raising a TemplateDoes…
…NotExist when it should have raised an ImproperlyConfigured. fixes 16502. by @ianawilson, @jambonrose
fixed test name from an old, overly specific iteration of the test
[1.6.x] Merge pull request #1580 from ianawilson/ticket_16502
Fixed #16502 -- Fixed a TemplateDoesNotExist error that should be an ImproperlyConfigured.
Assistance on the patch from #jambronrose.
Backport of 9b2dc12 from master.